Quick answer
Your Merchant Category Code (MCC) is assigned by your acquiring bank and signals to Visa, Mastercard, and other processors what type of business you are. High-risk MCCs trigger enhanced monitoring, larger reserves, higher fees, and stricter chargeback threshold enforcement. Knowing your MCC and what it triggers lets you prepare correctly.
What an MCC does to your account
The MCC affects three things: the risk tier your account is placed in (which controls monitoring frequency and threshold levels), the interchange rate category your transactions route to (affecting your processing cost), and the reserve requirement your acquirer applies at setup.
A business assigned MCC 5999 (miscellaneous retail) may face different treatment than the same business assigned a narrower code. Some acquirers charge higher reserves for specific MCCs regardless of your chargeback history. This is why MCC assignment is part of the underwriting conversation — not just an administrative step.
Common high-risk MCCs
Drug Stores and Pharmacies
Used for online pharmacies — enhanced compliance review
Miscellaneous and Specialty Retail Stores
Catch-all for many high-risk products including supplements and wellness
Drugs, Drug Proprietaries and Druggists' Sundries
Nutraceuticals and OTC products often assigned here
Dating and Escort Services
Dating platforms — high chargeback tolerance scrutiny
Government Licensed Casinos
Gambling-adjacent — most domestic processors decline
Cigar Stores and Stands
Tobacco and vape products frequently mapped here
Gift, Card, Novelty, and Souvenir Shops
Used for some digital goods and collectibles
Computer Software Stores
Digital downloads including courses and tools
Computer Network/Information Services
VPN and software subscription services
Card and Party Goods
Sometimes applied to subscription box merchants
Can you change your MCC?
Yes, but only through your acquirer — and they must agree the change is appropriate for your actual business model. Requesting a MCC change to a lower-risk code when your business model has not changed is a compliance risk. Processors and card networks audit MCC accuracy periodically. Misclassification discovered after the fact can result in reserve holds or termination.
If your business model genuinely fits a lower-risk MCC — for example, a wellness company that transitioned from supplements to licensed telehealth — the conversation with your acquirer is worth having. Document the business model change clearly before requesting the review.
MCCs and chargeback monitoring programs
Some MCCs carry lower chargeback threshold enforcement — meaning the network allows fewer chargebacks before triggering a monitoring program. If you are in a monitored MCC category, your operational targets should be tighter than the published thresholds suggest. See the Visa and Mastercard chargeback threshold guide to understand what your specific MCC implies for enforcement risk.